cranial nerve

cranial-nerve的词性：
n.（名词）

1. Any of several nerves that arise in pairs from the brainstem and reach the periphery through openings in the skull. There are 12 such pairs in mammals, birds, and reptiles and usually 10 pairs in amphibians and fish.
脑神经：任一组成对地起源于大脑中枢并通过颅骨的开口到达身体的周围各部位的神经。在哺乳动物、鸟类和爬行动物中有十二对，在两栖动物和鱼类中通常有十对